04-25-2015, 08:18 PM
Cone rub is when the speaker cone or the 'spider' gets out of alignment causing the center of the cone to rub. Silvertone speakers (and a lot of others) have a rod that the center of the speaker is formed around. Usually there is some space there, but it get a little off the center will rub and get stuck on that rod and rattle.
No matter where you go, there you are.